Identifying an obstacle in a route

ABSTRACT

A system and computer implemented method for identifying an object in a route is disclosed. The method may include capturing a first set of images during a first traversal of a first route. The method may also include capturing a second set of images during a second traversal of the first route. The method may also include identifying, by comparing the first set of images with the second set of images, an object in the second set of images meeting an obstruction criteria. The method may also include providing a notification of the object which was identified as meeting the obstruction criteria.

FIELD

The present disclosure relates to various embodiments of a system andmethod for object identification, and more specifically, to detecting anobstacle in a route of a visually impaired user.

BACKGROUND

In the field of computer vision, object recognition is the task offinding and identifying objects in an image or video sequence. Objectrecognition techniques can be leveraged to objects that may be potentialobstacles. Accordingly, using object recognition techniques to identifyobstacles may provide benefits associated with navigation of a route.

SUMMARY

Aspects of the present disclosure, in certain embodiments, are directedtoward a method for identifying an object in a route. In certainembodiments, the method may include capturing a first set of imagesduring a first traversal of a first route. In certain embodiments, themethod may include capturing a second set of images during a secondtraversal of the first route. In certain embodiments, the method mayinclude identifying, by comparing the first set of images with thesecond set of images, an object in the second set of images meeting anobstruction criteria. In certain embodiments, the method may includeproviding a notification of the object which was identified as meetingthe obstruction criteria.

The above summary is not intended to describe each illustratedembodiment or every implementation of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings included in the present application are incorporated into,and form part of, the specification. They illustrate embodiments of thepresent disclosure and, along with the description, serve to explain theprinciples of the disclosure. The drawings are only illustrative ofcertain embodiments and do not limit the disclosure.

FIG. 1 is a flowchart illustrating a method for identifying an obstaclein a route, according to embodiments;

FIG. 2 is an example system for identifying an obstacle in a route,according to embodiments;

FIG. 3 is an example route traversal, according to embodiments; and

FIG. 4 depicts a high-level block diagram of a computer system forimplementing various embodiments of the present disclosure, according toembodiments.

While the invention is amenable to various modifications and alternativeforms, specifics thereof have been shown by way of example in thedrawings and will be described in detail. It should be understood,however, that the intention is not to limit the invention to theparticular embodiments described. On the contrary, the intention is tocover all modifications, equivalents, and alternatives falling withinthe spirit and scope of the invention.

DETAILED DESCRIPTION

Aspects of the present disclosure relate to various embodiments of asystem and method for object identification. More particular aspects ofthe present disclosure relate to detecting an obstacle in a route of avisually impaired user. The method includes capturing a first set ofimages during a first traversal of a first route, and capturing a secondset of images during a second traversal of the first route. An object inthe second set of images meeting an obstruction criteria is identified.Identifying the object meeting the obstruction criteria includescomparing the first set of images with the second set of images anddetecting the object using an image processing algorithm. The method mayalso include providing, in response to identifying the object in thesecond set of images meeting the obstruction criteria, a notification ofthe object.

For a visually impaired person, navigating a route from one location toanother can pose a variety of challenges. If a visually impaired personis not familiar with the route, there may be a number of obstacles thathe or she carefully maneuvers to arrive at his or her intendeddestination. When a visually impaired person is traversing a known route(e.g., a path they take relatively frequently), he or she may havememorized the location of objects and the number of steps from onelocation to another. However, aspects of the present disclosure relateto the recognition that, in certain situations, an unexpected obstaclein a known route (e.g., an object that has been moved into the route)may be potentially hazardous to a visually impaired person, as he or shemay not be on their guard for obstacles when traveling a familiar route.Accordingly, aspects of the present disclosure, in certain embodiments,relate to a system and method for capturing images of a route, andidentifying potential obstacles. A notification of the potentialobstacle may be provided to the user of the system. Aspects of thepresent disclosure may provide benefits associated with confidence,efficiency (e.g., faster and safer route traversal) and safety for avisually impaired user.

Aspects of the present disclosure include a method and system for objectidentification. More particular aspects relate to detecting an obstaclein a route. The method and system may work on a number of devices andoperating systems. Aspects of the present disclosure include capturing afirst set of images during a first traversal of a first route. Aspectsof the present disclosure also include capturing a second set of imagesduring a second traversal of the first route. In certain embodiments,the first set of images and the second set of images are captured by amobile device, such as a smart phone, a tablet, a smart watch, wearablecomputing device, or other such system. In certain embodiments, thefirst set of images and the second set of images are captured atspecified time intervals (e.g., 30 seconds, 1 minute, 3 minutes, etc.)Certain embodiments of the present disclosure are directed towardcapturing a first set of videos and a second set of videos foridentifying an object in a route. Capturing the first set of imagesduring the first traversal of the first route may include creating astarting point of the first route. The starting point of the first routemay be created in response to a route traversal initiation command. Inresponse to receiving the route traversal initiation command, the methodcan include collecting image data and distance data for a path traversedby a user. The method can also include creating an ending point of thefirst route in response to receiving a route traversal terminationcommand. In certain embodiments, the first set of images and the secondset of images are captured at a set of image capture locations, such asdoorways, corners, hallways entrances, or configurable distanceincrements.

In certain embodiments, capturing the first set of images during thefirst traversal of the first route includes collecting route frequencydata for a set of routes traversed by a user. The first route may, forexample, be a frequently traversed path by a user between a firstlocation and a second location. The method can then include determining,for a specific route of the set of routes traversed by a user, that afrequency value is greater than a frequency threshold value. In responseto determining that the specific route has a frequency value greaterthan a frequency threshold value, the method includes selecting theroute as the first route.

Aspects of the present disclosure, in certain embodiments, are directedtoward identifying an object in the second set of images meeting anobstruction criteria. The object in the second set of images meeting theobstruction criteria can be identified by comparing the first set ofimages with the second set of images. The obstruction criteria caninclude a displacement threshold and an object size threshold. Incertain embodiments, identifying the object in the second set of imagesmeeting the obstruction criteria includes using a digital imageprocessing algorithm configured to use Scale-Invariant-Feature Transform(SIFT) techniques to detect one or more objects and measure one or moredimensions of the one or more objects.

Aspects of the present disclosure, in certain embodiments, are directedtoward providing a notification of the object. The notification of theobject can be provided in response to identifying the object in thesecond set of images meeting the instruction criteria. The notificationof the object may be provided as a voice call/message to a mobiledevice. The method may also include determining, using a user interfaceprovided on the mobile device, a set of route preferences and a set ofobstruction criteria preferences.

Turning now to the figures, FIG. 1 is a flowchart illustrating a method100 for identifying an obstacle in a route, consistent with embodimentsof the present disclosure. Aspects of FIG. 1 are directed toward usingimages captured at a set of image capture points to identify an obstaclein the path of a user. The method 100 may begin at block 102 and end atblock 112. Consistent with various embodiments, the method 100 caninclude a first capturing block 104, a second capturing block 106, anidentifying block 108, and a providing block 110.

Consistent with various embodiments of the present disclosure, at block104 the method 100 includes capturing a first set of images during afirst traversal of a first route. The first route may be a path taken bya user from one location to another. For instance, a user at his or herworkplace walking from his or her office to the nearest bathroom may bean example of the first route. The first traversal includes the movementof a user from a first location to a second location along the firstroute. In certain embodiments, the first set of images is captured by amobile device. For example, the first set of images may be captured by asmart phone, tablet, smart watch, wearable computing device, or othersuch system. In certain embodiments, the first set of images is capturedat specific time intervals (e.g., 30 seconds, 1 minute, 3 minutes,etc.). The images can be stored locally on the mobile device, or can bestored on a remote storage device or server accessible to the mobiledevice. The images may portray the features of the environmentsurrounding the user. For example, the images may show a hallwayincluding one or more doorways, wastebaskets, people, and other featuresof the environment. In certain embodiments, the method 100 includescapturing a first set of videos of the environment. In certainembodiments, the first set of images is a set of images depicting thefirst route with no identified obstructions. In certain embodiments, thefirst set of images is a collection of images (e.g., images with noobstructions) from the first traversal of the first route as well assubsequent traversals of the first route. Other configurations for thefirst set of images are also contemplated.

Consistent with various embodiments, the first route may be determinedin one of a number of ways. In certain embodiments, the first route is afrequently traversed path by a user between a first location and asecond location. That is, the first route is determined based on thenumber of times that a user takes a particular route. Accordingly, incertain embodiments, capturing the first set of images includescollecting route frequency data for a set of routes traveled by a user.The route frequency data may be a record of the number of times a userhas taken a certain path within a certain time period. Further,capturing the first set of images includes determining, for a specificroute of the set of routes traversed by a user, that a frequency valueis greater than a frequency threshold value. In response to determiningthat the specific route has a frequency value higher than a frequencythreshold value, the specific route is selected as the first route.

Consider the following example. While at a workplace, a user may travelfrom his or her office to one or more other destinations (bathroom,lunchroom, vending machine, coworkers' offices, etc.) multiple timesthrough the course of a day. The method 100 includes monitoring theroutes taken by the user, and the number of times a user takes eachroute during the day. A user may travel to the lunchroom once a day, thevending machine twice a day, a coworker's office twice a day, and thebathroom 6 times a day. The frequency threshold value may be 5 times perday. Accordingly, as the user has visited the bathroom 6 times duringthe day, the path from the office of the user to the bathroom may bedetermined to be the first route. Other frequency threshold values arealso possible. For example, in certain embodiments, the frequencythreshold value may be 10 times per week, 2 times per hour, 100 timesper year, etc. In certain embodiments, the frequency value is a movementpace of a user. For example, the frequency value may be higher when auser is hurrying.

Consistent with various embodiments, the user may use a mobile device tomanage route preferences. For example, the mobile device may be a smartphone, tablet, smart watch, or other wearable computer device. Incertain embodiments, the mobile device used to manage route preferencesis the same mobile device used to capture the first set of images.Consistent with various embodiments, the first route may also bedetermined manually by a user. Accordingly, the user can input a routetraversal initiation command to create a starting point of the firstroute. In certain embodiments, the route traversal initiation command isreceived by the mobile device. The route traversal initiation command,in certain embodiments may, in certain embodiments, be input via a voicecommand, button press, or touch screen navigation. In response toreceiving the route traversal initiation command, the method 100includes collecting image data and distance data for a path traversed bya user. The image data may include pictures of the environmentsurrounding the user. The distance data may be collected byaccelerometers of the mobile device, and may track how far the usertravels along the path. In response to receiving a route traversaltermination command, the method 100 can include creating an ending pointof the first route.

As an example, a user at a workplace may input a route traversalinitiation command to a mobile device, creating a starting point for thefirst route. The user may then proceed from his or her office to avending machine. While the user is moving from his or her office to thevending machine, the method 100 can include collecting data in the formof images, step counts, changes in direction, and other data toestablish the path from the office to the vending machine. When the userarrives at the vending machine, he or she may input a route traversaltermination command to the mobile device, indicating that thedestination has been reached, and creating an ending point of the firstroute. In certain embodiments, the ending point of the first route maybe created in response to the user pausing at the vending machine for atime period greater than a threshold length of time.

Consistent with various embodiments, at block 106 the method 100includes capturing a second set of images during a second traversal ofthe first route. As described herein, the second set of images is becaptured by a mobile device. For example, the second set of images maybe captured by a smart phone, tablet, smart watch, wearable computingdevice, or other such system. The images can be stored locally on themobile device, or may be stored on a remote storage device or serveraccessible to the mobile device. The images may portray the features ofthe environment surrounding the user. For example, the images may show ahallway including one or more doorways, wastebaskets, people, and otherfeatures of the environment. The second traversal may be movement of auser from the first location to the second location along the firstroute, and may take place subsequent to the first traversal. In certainembodiments, the second set of images may replace the first set ofimages, and serve as an updated “baseline” for the first route.

Consistent with various embodiments, the first set of images and thesecond set of images are captured at a set of image capture locationsalong the first route. The image capture locations may be one or morespecific features or areas of the first route where capturing images maybe associated with benefits for a user navigating the first route. As anexample, the image capture locations may include doorways, corners,hallways entrances, or configurable distance increments (e.g., everythree feet along a straight hallway). Other image capture locations arealso possible. In certain embodiments, the image capture locations areautomatically identified by the method 100 based on changes indirection, walking speed, or other movement characteristics detected byaccelerometers of the mobile device. In certain embodiments, the imagecapture locations are identified by image data collected by the mobiledevice while determining the first route. In certain embodiments, theimage capture locations are programmable by a user, and managed usingthe mobile device.

Consistent with various embodiments, at block 108 the method 100includes identifying, by comparing the first set of images with thesecond set of images, an object in the second set of images meeting anobstruction criteria. In certain embodiments, identifying the object inthe second set of images meeting the obstruction criteria includes usinga digital image processing algorithm. The digital image processingalgorithm can compare the first set of images with the second set ofimages, and use one or more object recognition techniques to identifythe object in the second set of images. A variety of object recognitiontechniques are possible. For example, the digital image processingalgorithm may use edge matching (e.g., Carny edge detection), greyscalematching, gradient matching, feature based methods, geometric hashing,Speeded Up Robust Features (SURF) techniques, and the like. In certainembodiments, the digital image processing algorithm uses Scale-InvariantFeature Transform (SIFT) to identify the image. Accordingly, the SIFTtechnique can use one or more “training images” to extract featuresdescriptions of various objects, and match features of the object in thesecond set of images with the feature descriptions of the objects in thetraining images to identify the object.

Consider the following example. The SIFT technique may use trainingimages of potted plants, janitorial carts, chairs, desks, and otherobjects to identify feature descriptions such as the dimensions, shape,light reflective properties (e.g., response to illumination changes),and other key points for each object of the training images.Accordingly, in embodiments of the present disclosure, the SIFTtechnique may identify an object by comparing the first set of images tothe second set of images, and determining that an object in the secondset of images was not present in the first set of images, and matchesthe feature description of a known object.

As described herein, in certain embodiments, the object of the secondset of images meets an obstruction criteria. The digital imageprocessing technique includes determining whether a given object in theset of images meets the obstruction criteria. The obstruction criteriamay include one or more factors that indicate that the object may be apotential obstacle or hazard for a user (e.g., a visually impaired user)traversing the area in which the object is located. In certainembodiments, the obstruction criteria includes a displacement thresholdand an object size threshold. The obstruction criteria may be fulfilledif an object meets either the displacement threshold or the object sizethreshold. The displacement threshold may be a distance that an objecthas moved between the first set of images and the second set of images.For example, in certain embodiments, the displacement threshold is 20centimeters. Accordingly, an object in the second set of images that hasmoved less than 20 centimeters from its position in the first set ofimages may not meet the obstruction criteria, while an object in thesecond set of images that has moved more than 20 centimeters from itsoriginal position in the first set of images may meet the obstructioncriteria.

In certain embodiments, the object size threshold is a set ofdimensions. In certain embodiments, the object size threshold includes alength threshold, width threshold, and height threshold. An object thatexceeds either the length threshold, width threshold, or heightthreshold may meet the obstruction criteria. As an example, in certainembodiments, the object size threshold is a length of 10 centimeters, awidth of 10 centimeters, and a height of 30 centimeters. Accordingly, apotted plant that is 8 centimeters long, 8 centimeters wide, and 32centimeters tall meets the obstruction criteria. Although an object sizethreshold and a displacement threshold are specifically mentionedherein, other obstruction criteria (e.g., a temperature threshold,object sharpness criteria, etc.) are also possible. In certainembodiments, the obstruction criteria are managed by a mobile device.For example, the mobile device can include a set of preferences thatallow a user to define the displacement threshold and the object sizethreshold.

Consistent with various embodiments, at block 110 the method 100includes providing, in response to identifying the object in the secondset of images meeting the obstruction criteria, a notification of theobject. Consistent with various embodiments, the notification of theobject can be provided in one of a number of ways. For example, incertain embodiments, the notification of the object is provided in theform of a voice message delivered via the mobile device, (e.g., smartphone, smart watch, tablet, etc.) or wearable computing device of theuser. In certain embodiments, the mobile device of the user vibrates ormakes a noise to indicate that an object meeting the obstructioncriteria has been identified in the route. In certain embodiments, thenotification includes a physical description of the object, a distanceindicating how far the object is from the user (e.g., 4 meters), theorientation of the position of the object, and the bearing of the objet(with respect to the user). Other methods of providing the notificationof the object meeting the obstruction criteria are also possible.

Consistent with embodiments of the present disclosure, aspects of themethod 100 may be implemented using an application on a mobile device(e.g., an app on a smart phone or tablet), a wearable computing device,or a surveillance system (e.g., surveillance sensors and cameras)stationed within a building or a home environment.

FIG. 2 is an example system 200 for identifying an obstacle in a route,consistent with embodiments of the present disclosure. As shown in FIG.2, the system 200 can include a route identification block 202, a routecreation and maintenance block 204, a first image set capture block 206,a first image set analysis block 208, a location determination block210, a route location data block 212, a first set of route images block214, a route traversal initiation block 216, an obstructionidentification system block 218, a second image set capture block 220, asecond image analysis block 222, and a notification system block 224.Consistent with various embodiments of the present disclosure, thesystem 200 is configured to operate on a mobile device (e.g., as anapplication on a smart phone, smart watch, tablet, or wearable computingdevice).

Consistent with various embodiments, at block 202 the system 200 can beconfigured to identify a route. As described herein, the route may be apath frequently traveled by a user from one location to another (e.g.,the path may have a frequency value higher than a frequency thresholdvalue). The route may be identified in one of a number of ways. Incertain embodiments, the route is determined based on the number oftimes that a user takes a particular route. For instance, the system 200may be configured to monitor the number of times a user takes a set ofpaths, and identify a specific route in response to it having afrequency value higher than a frequency threshold value. In certainembodiments, the route identification is performed manually, by defininga route starting point (e.g., via a user inputting a route traversalinitiation command into a mobile device configured to manage routepreferences), traversing the first route, and then defining a routeending point (e.g., via a user inputting a route traversal terminationcommand into a mobile device configured to manage route preferences.)

Consistent with various embodiments, the system 200 can include a routecreation and maintenance block 204. As described herein, the routecreation and maintenance block 204 can be configured to capture a firstset of images at block 206. The first set of images may be captured by amobile device such as a smart phone, smart watch, tablet, or otherwearable computer device. The first set of images can represent a“baseline” for the route. The number of images captured for the routebaseline may be determined based on the image capture rate, availablestorage space, network connectivity, or other parameters associated withthe mobile device.

At block 208, the system 200 can be configured to analyze the first setof images. The first set of images may be analyzed with one of a numberof image processing techniques (e.g., edge matching, greyscale matching,gradient matching, feature based methods, geometric hashing, Speeded UpRobust Features (SURF) techniques, and the like) to identify theplacement of doorways, objects, hallways, corners, and otherenvironmental features. Based on the image analysis, at block 210 thesystem 200 can be configured to determine a set of image capturelocations for the route. The image capture locations may be one or morelocations that may potentially be difficult for a user to navigatewithout guidance. For example, the image capture locations can bedoorways, corners, desks, hallway entrances, or configurable distanceincrements (e.g., every 3 feet.) In certain embodiments, the first setof images may be tagged to indicate the set of image capture locations.

Consistent with various embodiments, the system 200 may, in certainembodiments, be configured to provide route location data 212 (e.g., theset of image capture locations) as well as the first set of images 214(e.g., the baseline of the route) to the obstruction identificationsystem 218. In certain embodiments, at block 216 the system 200 includesinitiating a route traversal. The route traversal may include a usermoving from a starting point to an ending point of the route identifiedat block 202. In certain embodiments, at block 216 the system 200 isconfigured to detect that the path of the user corresponds to the routeidentified at block 202 using a tracking system (e.g., GPS, an RFID bitattached to the user or mobile device, thermal imaging to track theuser's body heat signature, etc.). In certain embodiments, the system200 detects that the path of the user corresponds to the routeidentified at block 202 by capturing a preliminary image and comparingit to the first set of images.

Consistent with various embodiments, the system 200 can include anobstruction identification system 218. On a second traversal (e.g., asubsequent traversal after the route has been identified, baseline setof images have been captured and image capture locations have beendetermined) of the route identified at block 202, the system 200 can beconfigured to capture a second set of images. As described herein, thesecond set of images may be taken at the set of image capture pointsdetermined in block 202. The second set of images may be captured usingthe same mobile device (e.g., smart phone, smart watch, tablet, wearablecomputing device, etc.) used to capture the first set (e.g., baseline)images. In certain embodiments, the mobile device detects that the userhas reached an image capture point using a tracking system (e.g., GPS,an RFID bit, thermal imaging, etc.) or using the tags of the first setof images.

Consistent with various embodiments, at block 222 the system 200 can beconfigured to analyze the second set of images to determine whether ornot an object meeting an obstruction criteria is present in the route.As described herein, in certain embodiments, at block 222 the system 200includes using a digital image processing algorithm to compare the firstset of images with the second set of images. The digital imageprocessing algorithm may use one or more object recognition techniquesto identify an object that was not present in the first set of imagesbut is present in the second set of images, or an object that has movedbetween the first set of images and the second set of images. Thedigital image processing algorithm may also use one or more imageprocessing techniques to determine the dimensions and shape of theobject. As described herein, at block 222 the system 200 can also beconfigured to determine whether the object meets an obstructioncriteria, such as a displacement threshold (e.g., an object that hasmoved more than a certain distance between the first and second set ofimages) or an object size threshold (e.g., and object is of a size orshape that could potentially be a hindrance for a user).

In certain embodiments, the system 200 is communicatively connected to acentral security system of a building or area. The central securitysystem may use one or more security cameras located throughout thebuilding to collect video footage for safety purposes. In certainembodiments, the central security system provides information regardingobjects or obstacles to the system 200 in advance. Accordingly, incertain embodiments, the system 200 suggests an alternative route to theuser, or notifies them of the potential objects prior to traversing aparticular route. In certain embodiments, mobile devices of other usersin the building are also communicatively connected to the system 200,and provide information (images, near-field communication data, etc.) tothe system 200 indicating potential obstacles in certain parts of thebuilding.

Consistent with various embodiments, at block 224, the system 200 can beconfigured to notify a user that an object meeting an obstructioncriteria has been identified in the route. The user may be notified inone of a number of different ways. In certain embodiments, thenotification is a voice message spoken through the mobile device (e.g.,an audible notification using a media file). In certain embodiments, themobile device vibrates or makes a sound to indicate the detection of anobject meeting the obstruction criteria. Other methods of notifying theuser of the object meeting the obstruction criteria are also possible(e.g., a braille printout at the starting point of the route).

Consistent with various embodiments, the system 200 may becommunicatively connected to a calendar application of the user. Thecalendar application may, for example, be a smart phone applicationinstalled on a smart phone of the user. Accordingly, information of thecalendar application may be leveraged by the system 200 for identifyingobjects or obstacles in a route. As an example, in certain embodiments,the calendar application may indicate that, at a certain day and time, alarge meeting will be taking place in a conference room nearby a routefrequently taken by a user. Accordingly, the system 200 may beconfigured to inform the user of the meeting, and suggest an alternativeroute.

In certain embodiments, the system 200 may be configured to collectinformation that may be used to assist a user in navigating an area orbuilding. For example, the system 200 may be configured to trackbehavior and movement data of the user, as well as create an object mapof an area or building, with the size and type of obstacles labeled onthe map. In certain embodiments, the user may indicate to the system 200(e.g., via a voice command, button press, or other input) a desireddestination, and the system 200 may provide a suggested route based onthe obstacle map and the historical behavior and movement data of theuser.

FIG. 3 is an example route traversal 300, consistent with embodiments ofthe present disclosure. Aspects of FIG. 3, in certain embodiments, aredirected toward a user navigating a route using a system and method foridentifying an obstacle in a route. In certain embodiments, the user isvisually impaired, and is navigating a school environment 350. Incertain embodiments, the route traversal 300 includes one or more imagecapture points 302, 304, 306, 308, 310, 312, 314. In certainembodiments, the starting location of the user is an office, and thedestination is a study room. The starting location may correspond withimage capture point 302, and the destination may correspond with imagecapture point 314.

Consistent with various embodiments of the present disclosure, the usermay define the first route. As described herein, the user may input aroute traversal initiation command into a mobile device in the form of avoice command. Accordingly, if the route traversal initiation command isinput to the mobile device when the user is at point 302, then point 302may be determined to be the starting point of the first route. The usermay then travel from point 302 to point 314, as shown in FIG. 3. As theuser is traveling the route, the mobile device may capture a first setof images for the first route. The mobile device can analyze the firstset of images using one or more image processing techniques, anddetermine a set of image capture locations. The image capture locationsmay be determined based on features of the school environment 350 thatmay be challenging for a visually impaired user to navigate. Forinstance, in the present example, image capture locations may bedetermined at corners or turns in the route, such as at point 304 andpoint 310. In certain embodiments, image capture locations aredetermined for doors and entrances, such as at point 306, 308, and 312.In certain embodiments, image capture locations are determined for thestarting point and ending point of a route, such as at point 302 andpoint 314, respectively. When the user reaches point 314, he or she mayinput a route traversal termination command in the form of a voicecommand to the mobile device. Accordingly, point 314 may be establishedas the ending point of the first route.

In certain embodiments, at some point in time after the first route hasbeen identified, the user may traverse the first route for a secondtime. Consistent with various embodiments of the present disclosure, themobile device detects that the user is beginning to traverse the firstroute via a tracking system (e.g., GPS, an RFID bit attached to the useror mobile device, thermal imaging to track the user's body heatsignature, etc.), accelerometers in the mobile device, or by comparingone or more images from the first set of images with images for thesecond traversal.

Consider the following example. The user may depart from his or heroffice with the intention of going to the study room. When the userleaves his or her office, the mobile device may capture an image capturepoint 302, the starting location of the first route. The image capturedat image capture point 302 may be compared to an image for that locationfrom the first set of images. In certain embodiments, no object orobstacle may be identified, and the user may continue to image capturepoint 304 without encountering an object or obstacle. An image may becaptured by the mobile device at image capture point 304. The imagecaptured at image capture point 304 may be compared to the “baseline”image of that location from the first set of images. In certainembodiments, a janitorial cart with an object size value above an objectsize threshold is identified in the path in front of the user.Accordingly, the mobile device may provide a notification to the user inthe form of a voice message, announcing the location of the janitorialcart. The user may continue forward, aware of the potential obstacle.

The user may continue moving until image capture point 312 withoutidentifying an object or potential obstacle at image capture points 308or 310. In certain embodiments, when compared with the baseline imagecaptured for that location, an image captured at image capture location312 may indicate that a potted plant (e.g., a cactus with sharp needles)has been moved 50 centimeters from its original location in the baselineimage. In certain embodiments, this displacement of 50 centimeters isgreater than an object displacement threshold, and the potted plant isidentified as meeting an obstruction threshold. Accordingly, the mobiledevice can provide a notification to the user in the form of a voicemessage, announcing the location of the potted plant. The user may thencontinue forward to reach his or her destination at image capture point314.

FIG. 4 depicts a high-level block diagram of a computer system 400 forimplementing various embodiments. The mechanisms and apparatus of thevarious embodiments disclosed herein apply equally to any appropriatecomputing system. The major components of the computer system 400include one or more processors 402, a memory 404, a terminal interface412, a storage interface 414, an I/O (Input/Output) device interface416, and a network interface 418, all of which are communicativelycoupled, directly or indirectly, for inter-component communication via amemory bus 406, an I/O bus 408, bus interface unit 409, and an I/O businterface unit 410.

The computer system 400 may contain one or more general-purposeprogrammable central processing units (CPUs) 402A and 402B, hereingenerically referred to as the processor 402. In embodiments, thecomputer system 400 may contain multiple processors; however, in certainembodiments, the computer system 400 may alternatively be a single CPUsystem. Each processor 402 executes instructions stored in the memory404 and may include one or more levels of on-board cache.

In embodiments, the memory 404 may include a random-access semiconductormemory, storage device, or storage medium (either volatile ornon-volatile) for storing or encoding data and programs. In certainembodiments, the memory 404 represents the entire virtual memory of thecomputer system 400, and may also include the virtual memory of othercomputer systems coupled to the computer system 400 or connected via anetwork. The memory 404 can be conceptually viewed as a singlemonolithic entity, but in other embodiments the memory 404 is a morecomplex arrangement, such as a hierarchy of caches and other memorydevices. For example, memory may exist in multiple levels of caches, andthese caches may be further divided by function, so that one cache holdsinstructions while another holds non-instruction data, which is used bythe processor or processors. Memory may be further distributed andassociated with different CPUs or sets of CPUs, as is known in any ofvarious so-called non-uniform memory access (NUMA) computerarchitectures.

The memory 404 may store all or a portion of the various programs,modules and data structures for processing data transfers as discussedherein. For instance, the memory 404 can store an object identificationapplication 450. In embodiments, the object identification application450 may include instructions or statements that execute on the processor402 or instructions or statements that are interpreted by instructionsor statements that execute on the processor 402 to carry out thefunctions as further described below. In certain embodiments, the objectidentification application 450 is implemented in hardware viasemiconductor devices, chips, logical gates, circuits, circuit cards,and/or other physical hardware devices in lieu of, or in addition to, aprocessor-based system. In embodiments, the object identificationapplication 450 may include data in addition to instructions orstatements.

The computer system 400 may include a bus interface unit 409 to handlecommunications among the processor 402, the memory 404, a display system424, and the I/O bus interface unit 410. The I/O bus interface unit 410may be coupled with the I/O bus 408 for transferring data to and fromthe various I/O units. The I/O bus interface unit 410 communicates withmultiple I/O interface units 412, 414, 416, and 418, which are alsoknown as I/O processors (IOPs) or I/O adapters (IOAs), through the I/Obus 408. The display system 424 may include a display controller, adisplay memory, or both. The display controller may provide video,audio, or both types of data to a display device 426. The display memorymay be a dedicated memory for buffering video data. The display system424 may be coupled with a display device 426, such as a standalonedisplay screen, computer monitor, television, or a tablet or handhelddevice display. In one embodiment, the display device 426 may includeone or more speakers for rendering audio. Alternatively, one or morespeakers for rendering audio may be coupled with an I/O interface unit.In alternate embodiments, one or more of the functions provided by thedisplay system 424 may be on board an integrated circuit that alsoincludes the processor 402. In addition, one or more of the functionsprovided by the bus interface unit 409 may be on board an integratedcircuit that also includes the processor 402.

The I/O interface units support communication with a variety of storageand I/O devices. For example, the terminal interface unit 412 supportsthe attachment of one or more user I/O devices 420, which may includeuser output devices (such as a video display device, speaker, and/ortelevision set) and user input devices (such as a keyboard, mouse,keypad, touchpad, trackball, buttons, light pen, or other pointingdevice). A user may manipulate the user input devices using a userinterface, in order to provide input data and commands to the user I/Odevice 420 and the computer system 400, and may receive output data viathe user output devices. For example, a user interface may be presentedvia the user I/O device 420, such as displayed on a display device,played via a speaker, or printed via a printer.

The storage interface 414 supports the attachment of one or more diskdrives or direct access storage devices 422 (which are typicallyrotating magnetic disk drive storage devices, although they couldalternatively be other storage devices, including arrays of disk drivesconfigured to appear as a single large storage device to a hostcomputer, or solid-state drives, such as flash memory). In someembodiments, the storage device 422 may be implemented via any type ofsecondary storage device. The contents of the memory 404, or any portionthereof, may be stored to and retrieved from the storage device 422 asneeded. The I/O device interface 416 provides an interface to any ofvarious other I/O devices or devices of other types, such as printers orfax machines. The network interface 418 provides one or morecommunication paths from the computer system 400 to other digitaldevices and computer systems; these communication paths may include,e.g., one or more networks 430.

Although the computer system 400 shown in FIG. 4 illustrates aparticular bus structure providing a direct communication path among theprocessors 402, the memory 404, the bus interface 409, the displaysystem 424, and the I/O bus interface unit 410, in alternativeembodiments the computer system 400 may include different buses orcommunication paths, which may be arranged in any of various forms, suchas point-to-point links in hierarchical, star or web configurations,multiple hierarchical buses, parallel and redundant paths, or any otherappropriate type of configuration. Furthermore, while the I/O businterface unit 710 and the I/O bus 408 are shown as single respectiveunits, the computer system 400 may, in fact, contain multiple I/O businterface units 410 and/or multiple I/O buses 408. While multiple I/Ointerface units are shown, which separate the I/O bus 408 from variouscommunications paths running to the various I/O devices, in otherembodiments, some or all of the I/O devices are connected directly toone or more system I/O buses.

In various embodiments, the computer system 400 is a multi-usermainframe computer system, a single-user system, or a server computer orsimilar device that has little or no direct user interface, but receivesrequests from other computer systems (clients). In other embodiments,the computer system 400 may be implemented as a desktop computer,portable computer, laptop or notebook computer, tablet computer, pocketcomputer, telephone, smart phone, or any other suitable type ofelectronic device.

FIG. 4 depicts several major components of the computer system 400.Individual components, however, may have greater complexity thanrepresented in FIG. 4, components other than or in addition to thoseshown in FIG. 4 may be present, and the number, type, and configurationof such components may vary. Several particular examples of additionalcomplexity or additional variations are disclosed herein; these are byway of example only and are not necessarily the only such variations.The various program components illustrated in FIG. 4 may be implemented,in various embodiments, in a number of different manners, includingusing various computer applications, routines, components, programs,objects, modules, data structures, etc., which may be referred to hereinas “software,” “computer programs,” or simply “programs.”

The present invention may be a system, a method, and/or a computerprogram product. The computer program product may include a computerreadable storage medium (or media) having computer readable programinstructions thereon for causing a processor to carry out aspects of thepresent invention.

The computer readable storage medium can be a tangible device that canretain and store instructions for use by an instruction executiondevice. The computer readable storage medium may be, for example, but isnot limited to, an electronic storage device, a magnetic storage device,an optical storage device, an electromagnetic storage device, asemiconductor storage device, or any suitable combination of theforegoing. A non-exhaustive list of more specific examples of thecomputer readable storage medium includes the following: a portablecomputer diskette, a hard disk, a random access memory (RAM), aread-only memory (ROM), an erasable programmable read-only memory (EPROMor Flash memory), a static random access memory (SRAM), a portablecompact disc read-only memory (CD-ROM), a digital versatile disk (DVD),a memory stick, a floppy disk, a mechanically encoded device such aspunch-cards or raised structures in a groove having instructionsrecorded thereon, and any suitable combination of the foregoing. Acomputer readable storage medium, as used herein, is not to be construedas being transitory signals per se, such as radio waves or other freelypropagating electromagnetic waves, electromagnetic waves propagatingthrough a waveguide or other transmission media (e.g., light pulsespassing through a fiber-optic cable), or electrical signals transmittedthrough a wire.

Computer readable program instructions described herein can bedownloaded to respective computing/processing devices from a computerreadable storage medium or to an external computer or external storagedevice via a network, for example, the Internet, a local area network, awide area network and/or a wireless network. The network may comprisecopper transmission cables, optical transmission fibers, wirelesstransmission, routers, firewalls, switches, gateway computers and/oredge servers. A network adapter card or network interface in eachcomputing/processing device receives computer readable programinstructions from the network and forwards the computer readable programinstructions for storage in a computer readable storage medium withinthe respective computing/processing device.

Computer readable program instructions for carrying out operations ofthe present invention may be assembler instructions,instruction-set-architecture (ISA) instructions, machine instructions,machine dependent instructions, microcode, firmware instructions,state-setting data, or either source code or object code written in anycombination of one or more programming languages, including an objectoriented programming language such as Java, Smalltalk, C++ or the like,and conventional procedural programming languages, such as the “C”programming language or similar programming languages. The computerreadable program instructions may execute entirely on the user'scomputer, partly on the user's computer, as a stand-alone softwarepackage, partly on the user's computer and partly on a remote computeror entirely on the remote computer or server. In the latter scenario,the remote computer may be connected to the user's computer through anytype of network, including a local area network (LAN) or a wide areanetwork (WAN), or the connection may be made to an external computer(for example, through the Internet using an Internet Service Provider).In some embodiments, electronic circuitry including, for example,programmable logic circuitry, field-programmable gate arrays (FPGA), orprogrammable logic arrays (PLA) may execute the computer readableprogram instructions by utilizing state information of the computerreadable program instructions to personalize the electronic circuitry,in order to perform aspects of the present invention.

Aspects of the present invention are described herein with reference toflowchart illustrations and/or block diagrams of methods, apparatus(systems), and computer program products according to embodiments of theinvention. It will be understood that each block of the flowchartillustrations and/or block diagrams, and combinations of blocks in theflowchart illustrations and/or block diagrams, can be implemented bycomputer readable program instructions.

These computer readable program instructions may be provided to aprocessor of a general purpose computer, special purpose computer, orother programmable data processing apparatus to produce a machine, suchthat the instructions, which execute via the processor of the computeror other programmable data processing apparatus, create means forimplementing the functions/acts specified in the flowchart and/or blockdiagram block or blocks. These computer readable program instructionsmay also be stored in a computer readable storage medium that can directa computer, a programmable data processing apparatus, and/or otherdevices to function in a particular manner, such that the computerreadable storage medium having instructions stored therein comprises anarticle of manufacture including instructions which implement aspects ofthe function/act specified in the flowchart and/or block diagram blockor blocks.

The computer readable program instructions may also be loaded onto acomputer, other programmable data processing apparatus, or other deviceto cause a series of operational steps to be performed on the computer,other programmable apparatus or other device to produce a computerimplemented process, such that the instructions which execute on thecomputer, other programmable apparatus, or other device implement thefunctions/acts specified in the flowchart and/or block diagram block orblocks.

The flowchart and block diagrams in the Figures illustrate thearchitecture, functionality, and operation of possible implementationsof systems, methods, and computer program products according to variousembodiments of the present invention. In this regard, each block in theflowchart or block diagrams may represent a module, segment, or portionof instructions, which comprises one or more executable instructions forimplementing the specified logical function(s). In some alternativeimplementations, the functions noted in the block may occur out of theorder noted in the figures. For example, two blocks shown in successionmay, in fact, be executed substantially concurrently, or the blocks maysometimes be executed in the reverse order, depending upon thefunctionality involved. It will also be noted that each block of theblock diagrams and/or flowchart illustration, and combinations of blocksin the block diagrams and/or flowchart illustration, can be implementedby special purpose hardware-based systems that perform the specifiedfunctions or acts or carry out combinations of special purpose hardwareand computer instructions.

The descriptions of the various embodiments of the present disclosurehave been presented for purposes of illustration, but are not intendedto be exhaustive or limited to the embodiments disclosed. Manymodifications and variations will be apparent to those of ordinary skillin the art without departing from the scope and spirit of the describedembodiments. The terminology used herein was chosen to explain theprinciples of the embodiments, the practical application or technicalimprovement over technologies found in the marketplace, or to enableothers of ordinary skill in the art to understand the embodimentsdisclosed herein.

What is claimed is:
 1. A system for identifying an object in a route,the method comprising: a first capturing module configured to capture afirst set of images during a first traversal of a first route; a secondcapturing module configured to capture a second set of images during asecond traversal of the first route; an identifying module configured toidentify, by comparing the first set of images with the second set ofimages, an object in the second set of images meeting an obstructioncriteria; and a providing module configured to provide a notification ofthe object which was identified as meeting the obstruction criteria. 2.The system of claim 1, wherein the obstruction criteria includes adisplacement threshold and an object size threshold.
 3. The system ofclaim 1, wherein the first capturing model includes: a first creatingmodule configured to create, in response to receiving a route traversalinitiation command, a starting point of the first route; a firstcollecting module configured to collect, in response to receiving theroute traversal initiation command, image data and distance data for apath traversed by a user; and a second creating module configured tocreate, in response to receiving a route traversal termination command,an ending point of the first route.
 4. The system of claim 1, whereincapturing the first set of images during the first traversal of thefirst route includes: a second collecting module configured to collectroute frequency data for a set of routes traversed by a user; a firstdetermining module configured to determine, for a specific route of theset of routes traversed by the user, that a frequency value is greaterthan a frequency threshold value; a selecting module configured toselect, in response to determining that the specific route has thefrequency value greater than the frequency threshold value, the route asthe first route.
 5. The system of claim 1, wherein the first set ofimages and the second set of images are captured by a mobile deviceincluding but not limited to one or more selected from the groupconsisting of smart phones, tablets, smart watches, and wearablecomputing devices.
 6. The system of claim 5, further comprising a seconddetermining module configured to determine, using a user interfaceprovided on the mobile device, a set of route preferences and a set ofobstruction criteria preferences.
 7. The system of claim 1, wherein thefirst route is a frequently traversed path by a user between a firstlocation and a second location.
 8. The system of claim 1, whereinidentifying the object in the second set of images meeting anobstruction criteria further comprises using a digital image processingalgorithm configured to use Scale-Invariant Feature Transform (SIFT)techniques to detect one or more objects, and measure one or moredimensions of the one or more objects.
 9. The system of claim 1, whereinthe first set of images and the second set of images are captured at aset of image capture locations selected from a group consisting ofdoorways, corners, hallway entrances, or configurable distanceincrements.
 10. A computer program product comprising a computerreadable storage medium having a computer readable program storedtherein, wherein the computer readable program, when executed on a firstcomputing device, causes the first computing device to: capture a firstset of images during a first traversal of a first route; capture asecond set of images during a second traversal of the first route;identify, by comparing the first set of images with the second set ofimages, an object in the second set of images meeting an obstructioncriteria; and provide a notification of the object which was identifiedas meeting the obstruction criteria.
 11. The computer program product ofclaim 10, further comprising computer readable program code to: create,in response to receiving a route traversal initiation command, astarting point of the first route; collect, in response to receiving theroute traversal initiation command, image data and distance data for apath traversed by a user; and create, in response to receiving a routetraversal termination command, an ending point of the first route. 12.The computer program product of claim 10, further comprising computerreadable program code to: collect route frequency data for a set ofroutes traversed by a user; determine, for a specific route of the setof routes traversed by the user, that a frequency value is greater thana frequency threshold value; select, in response to determining that thespecific route has the frequency value greater than the frequencythreshold value, the route as the first route.
 13. The computer programproduct of claim 10, wherein the first set of images and the second setof images are captured by a mobile device including but not limited toone or more selected from the group consisting of smart phones, tablets,smart watches, and wearable computing devices.
 14. The computer programproduct of claim 13, further comprising computer readable program codeto determine, using a user interface provided on the mobile device, aset of route preferences and a set of obstruction criteria preferences.15. The computer program product of claim 10, wherein the first set ofimages and the second set of images are captured at a set of imagecapture locations selected from a group consisting of doorways, corners,hallway entrances, or configurable distance increments.